We are having quite some problems with the underlying filesystem for the cosd's and I would like to hear about other experiences. Here is what we have gone through so far: btrfs with 2.6.38: - good performance - frequently hitting of various BUG_ON conditions btrfs with 2.6.39: - big performance problems after a few days uptime - occasionally hitting BUG_ON conditions btrfs with 3.0: - big performance problems after a few days uptime - occasionally hitting a deadlock in the btrfs filesystem (cosd is in D-state) ext4 with a RHEL6.0 kernel (don't remember exactly): - almost immediate blowup of the kernel (OOPS) >From what I read in Fyodors emails ext4 in 2.6.39 isn't much better. So, what filesystem would you recommend? Thanks, Christian -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html